Gary Coleman was admitted to Utah Valley Regional Medical Center in Provo, Utah on May 26th, 2010, after falling and hitting his head. He initially suffered an intracranial hemorrhage at his home in Spanish Fork, Utah, and was announced to be in critical condition. Within hours, Coleman was unconscious and on life support, dying at 12:05 p.m. MDT on May 28, 2010. (from Wikipedia)

My favorite: I met him at an arcade he ran in Los Angeles when I was a kid, maybe 15 years ago. I couldn't believe it was him, but at the same time, wasn't so much excited as confused. Can't really say why.